Don't do that if you don't know the exchanger's reputation.
better follow IEO on exchangers who have good reputations such as binance exchangers.
Some exchanges has the fee for IEO registration to the exchange which is really bad for the project and the investors, but good exchange like binance is different, they have qualified the projects that want to list on their exchange before they accepted and held an IEO. So be careful from some mock projects which paying some exchange to list their project into IEO on some paid exchanges.
You can actually trust IEO until now, but in the condition of the market, I dont think you can earn with this state because it actually dumping but it is recovering, not so good just like before. I think we should wait until the market recovers again, and that is the perfect time to invest in any particular IEO that you want as long as you are choosing or picking a good one. At a time like this, every IEO that are being listed maybe not in good condition also, we should wait for that to happen. It is depending on a platform if they have a solid platform that makes investors proud maybe they can be successful.